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        <title>目录操作API</title>
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           <h1>常见目录操作API</h1>
           <p>access: 判断文件或目录是否具有操作权限</p>
           <p>stat:获取目录及文件信息</p>
           <p>mkdir:创建目录</p>
           <p>rmdir:删除目录</p>
           <p>readdir:读取目录中内容</p>
           <p>unlink:删除指定文件</p>
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